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2004 Pontiac Bonneville GXP 4.6L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 1/16/2020 13 Replies

Vehicle came in with MIL and P0171, P0174 and P0300 stored. Started cold and found that even numbered cylinders misfired until vehicle went into closed loop, then smoothed out but lean exhaust on bank 2 remained (35+ on bank 2). Found intake duct boot to...

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  Related Documents & Media  2004 Pontiac Bonneville GXP

 
Message Closed w/Summary

car Vehicle Data

2004 Pontiac Bonneville GXP

VIN 1G2HZ54Y44
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursCold, Hot, Idle

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0300Multiple Misfire Detected
Message Closed w/Summary

car Vehicle Data

2004 Pontiac Bonneville GXP

VIN 1G2HZ54Y44
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursCold, Hot, Idle

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0300Multiple Misfire Detected